This is great product. I had no problem setting it up and after the initial charge, it just worked like a charm. The only thing is that I use the overhead band. It appears to be a bit too tight and there is no adjustment. I guess I just have to get used to its.
I deducted one star due to uncomfortability and price. Other than that, it's a great product.

Works great. No surprises. What one would expect from a professional-caliber product at this price point. Easy to install. Only caveat is that you lose call-waiting caller-id when you are on a headset, since it has no display.